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@Moshe What do you mean by "occupations and locations"? Are you asking for any and all Jewish names, their meanings and origins?
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WAFDec 26 '10 at 4:14

It is said that Katz is an acronym for Kohen Tzedek and Segel for Segan Leviim.
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YDKDec 26 '10 at 6:04

@YDK Is there evidence of those names being acronyms?
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cubeDec 26 '10 at 14:00

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cube, yes. There are many manuscripts and early printed seforim in which both these names appear and there is a " in between the kof and tzadi of Katz, as well as between the gimel and lamed of Segal. These clearly indicates that they are acronyms. One example would be the seforim of the Shach, in which, although he was known by the last name Katz, he is called "Kohein Tzedek. e.g hebrewbooks.org/pdfpager.aspx?req=45712&pgnum=1
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YahuDec 27 '10 at 1:45